8th Grade Science
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​Graphing Motion

  • Motion occurs when there is a change in position of an object with respect to a reference starting point.
  • The final position of an object is determined by measuring the change in position and direction of the segments along a trip. The following terms are used to describe and determine motion:
​Position
  • Position is the location of an object.
  • An object changes position if it moves relative to a reference point (starting point).
  • The change in position is determined by the distance and direction of an object’s change in position from the starting point (displacement).
Direction
  • Direction is the line, or path along which something is moving, pointing, or aiming.
  • Direction is measured using a reference point with terms such as up, down, left, right, forward, backward, toward, away from, north, south, east, or west.
Speed
  • The slope (slant or angle) of the line can tell the relative speed of the object.
  • When the slope of the line is steep, the speed is faster than if the slope were flatter.
  • When the slope of the line is flatter, the speed is slower.
  • When the slope of the line is horizontal to the x-axis, the speed is zero (the object is not moving).
Position-Time Graphs
  • A graph used to show a change in an object’s location over time.
  • For this type of graph, time (the independent variable) is plotted on the x-axis and the position (the dependent variable) is plotted on the y-axis.

Slope

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Different types of graphs representing changes in speed and direction.

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  • Home
  • Question of the Day
  • Vocabulary Practice
  • Earth Systems and Resources
    • Weathering, Erosion, Deposition
    • Rock Cycle
    • Earth Layers >
      • Evidence for Earth's Layers
    • Plate Tectonics >
      • Continental Drift
      • Divergent Plate Boundaries
      • Convergent Plate Boundaries
      • Transform Plate Boundaries
      • Hot Spots
    • Evidence for Plate Tectonics
    • Patterns of Earthquakes and Volcanoes
    • Forces inside Earth
    • Catastrophic Events >
      • South Carolina Earthquakes
    • Earth Resources
  • Earth's History and Diversity of Life
    • Geologic Time >
      • Geologic Time Scale
      • Precambrian
      • Paleozoic Era
      • Mesozoic Era
      • Cenozoic Era
    • Law of Superposition & Index Fossils
    • Catastrophic Events
    • Fossil Evidence
    • Fossil Formation
    • Adaptations & Natural Selection
    • Extinction Factors >
      • Endangered Species
  • Earth's Place in the Universe
    • Milky Way Galaxy
    • Expanding Universe
    • Our Sun
    • The Solar System >
      • Mercury
      • Venus
      • Earth
      • Mars
      • Jupiter
      • Saturn
      • Uranus
      • Neptune
    • Celestial Objects
    • Gravity
    • Seasons
    • Sun-Earth-Moon Motion
    • Phases of the Moon
    • Eclipses
    • Tides
    • Space Technology
  • Forces and Motion
    • Force vs. Mass
    • Balanced vs. Unbalanced Forces
    • Inertia
    • Action = Reaction
    • Friction & Gravity
    • Graphing Motion
    • Average Speed
    • Newton's Laws of Motion
  • Waves
    • Matter & Energy
    • Properties of Waves
    • Behavior of Waves
    • Interacting Waves
    • How We See in Color
    • Electromagnetic Technology
  • Rocket Science!
  • Need Help?